Parsley is probably the most widely used herb. It has dark green curly leaves and contains 3 times as much vitamin C as oranges, twice the iron of spinach. It is also a great source of Vitamin A, folate, potassium and calcium. It is most widely used as a garnish for a variety of dishes. Parsley added to any savory dish helps bring out the flavor of other spices. Parsley is also a great breath freshener!